Type-bar bearing for type-writing machines.



Y PATENTED MAE. 26, 1907. o. o. KAYLE. TYPE EAR BEARING EOE TYPE WRITING MACHINES.

APPLIOATION FILED NOV. 9I 1906.

, nNrrn sa-Ars PATENT OFFIOE.

OsoAR c. KAvLE, 'or sYRAcUsE, New YORK, AssieNoR To HARVEYA. MOYER AND EMMIT e.v LATTA., or sYRAoUsE, New YORK TYPE-@AR BEARINGEFOR TYPE-wm'rme MACHINES.

atenten Maren 26. 1907 Application filed November 9, 1906. Serial No. 342.607.v

Be itv known that'l, OSCAR C. KAVLE, a

" citizen of the United States, residing at Syraeuse, in the county of Onondaga and State of )New York, have invented anew and useful Improvement in Type-,Bar Bearings for Type- Wrlting Machines, of which the following is a specification.

This invention relates more particularly to the vconstruction of the type-bars and their 'hangers or supports-of type-writing machines and the connecting pivotal bearings.

The primary object of the invention is to produce a light, strong, and durable pivotbearing which vwill insure freedom of movenient of the type-bar without lateral play or Tn the accompanying drawings, 4Figure 1 is` a side elevation of a type-bar and its bearing embodying theinvention, showing the supporting .segment or part 1n cross-sectio n.

Fig. 2 is afragmentary central long ritudinal section thereof without the segment. F 1g; 3-

is a cross-section thereof, on an enlarged scale, in line 3 3, Fig. 2. Fig. 4 1s an enlarged 'cross-section ofthe pivot-stud and screw.

Fig. 5 is an enlarged side elevation, partly in section, of the pivot-stud. Fig. 6 is an ele vation of a type-bar, hanger, and its bearing, of slightly-difeirent construction. Figs. 7 and 8 are views similar, respectively, to Figs. 2 and 3 of the construction shown in Fig. 6. Fig. 9 is a detached sectional elevation of a pivot-stud of modified construction.

Like letters of reference refer to like parts in the several figures.

Referring first to the construction illus trated in Figs. 1-5, A represents a type bar, and B the hanger or'part to which the type-bar is pivoted. The type-bar is made of a single sheet-metal stamping having th'e sides thereof, atthe pvot end of the bar at least-,fgreund perfectly flat andparallel with each other. The hanger is bifurcated, hav 'ing separated branches. or side walls, and preferably consists of a' central flat-sided body l) and two Hat-faced side plates b', secured to opposite sides of the body and projecting beyond one edgeof the body to embrace the type-bar. The separate body and side plates of the hanger can be economically stamped from sheet metal and groundv true,

body their inside faces, between which the type-bar is pivoted, will be exactly parallel. The typebar is ground very slightly thinner than the body of thehanger, so thatv itcan swing freely between the side plates, but will be prevented thereby from side play or movement.: The side plates are secured to the body of thehanger-by screws c. T he hanger bifurcated or recessed portion to receive the pivot end of the type-bar; but 1the construction described` is preferred, because of the iearmg.

D represents through a bearing-hole in the type-bar and secured at opposite ends to the side plates of the hanger. Thestud has a cylindrical body portion between the side plates, whichfserves and constitutes the pivoton which the typebar swings. ln the construction shown in Figs.- 1-5 the pivot-stud has a reduced end the hanger side plates, with-the shoulder sui'- roundingthe reduced end bearin flat against pendicularly to'the side plate'. The stud is secured -to the other hanger side plate by a screw E, passing through a hole in the plate and screwed into a threaded hole in the stud. The v.hole in the side late for thescrew is preferably countersun portion of the pivot-stud is made exactly the same length as the thickness ofthe bod of .the hanger. This can be 'conveniently one by securinQd or riveting the stud to .the side pla and. tlieninserting the stud in a hole it, Fig 1 and2, provided for the purpose in the shank of the hanger, with the side plate flat against the side ofthe hanger, and grinding' vthe projecting .end of the stud flat andxso that when the latter are secured 'to the ggreat precision possible in manufacturing the portion d, whichis riveted in ahole in one of the side plate to rigidly secure t e ,studper-' could be made of other construction having a a pivot stud or post passing.'A

to hold them at the proper distance apart to receive the largel head of the screw.y The cylindrical body IOO . could be riveted or otherwise permanently lsecured .to the hangcrsbody; but the detachthe ,hole for the screw E passes entirely throu h the stud D to facilitate tapping the (.lescribed, except thatl the small end ofthe 'The side plates are then placed in position on 4between the side plates or too loose.

type-bar ground as required to insure free- ,hardened or tempered to give long wear,

stud and whichfhascbeen previously carbonl.duced rivet ends the carbonized portion -olv the stock is removed, and when the studs are actly flush with the face of the hanger-body. fter the1 stud is ground it is removed from the hole in the hanger and insertedthrough i: the pivot-opening ,of the type-bar and is secured to the other side plate by the screw E.

opposite sides of the hanger-body and se-y cured by' driving in the screws E and c. The cylindrical body of the pivot-stud being, as explained, precisely as long the thickness of the hanger-body, it will insure the exact parallelism of thehanger side plates, and it will beimpossibleto cause the side plates to bindyon or pinch the type-bar in tightening up the screw E. Occasionally a type-bar will be found to be too tight to swing lfreelly n such'case one side plate can be detacl'ied and the hanger-body and pivot-stud or thev dom of movement ol' the typebar without lateral play or looseness. 'lhe side plates able screw connection is preferable, as it-permits the disconnection of the hanger and bar. The cylindrical' body ol the pivot-stud is' While the reduced rivet end thereof is left soft, so that the stud can be properly riveted to the hanger side plate. This can'be accomplished by machining the lstuds from stock ofthe same diameter as the body of the ized to a slightdepth. In turning the reafterward tempered the 'cylindrical surface of their bodies will be hardened, while their rivet ends will remain soft.

The pivot-stud could be of different construction.' For instance, as shown in Fig. 8,

threa but is' not, liowever,tln'ea(led through the reduced end of the stud, as this would unduly weaken the rivet end, which it is desirable to make of as small diameter' as possible. This form of the stud somewhat. cheaper to make than that above described; but the former is considered preferable, because its rivet end can be made considerably smaller in diameter, thus leaving a larger shoulder to rest on they side plate, and thereby making the stud more rigid and also permitting the same stampings with holes of the same size to be used for both side plates. 4 j

Fig. 9 shows a stud D2 similar to that irstl stud is threaded. to be screwed into a threaded hole in the side plate. This shoulder of the stud is undercut slightly at e2 to provide clearance for the thread. The construction 4hole of the type-bar need be exact.

ployedI in hangers or type-,bars of is usedmwhen theestud is made ofstock that y A bearing with the pivot stud or post con-l structed and rigidly secured to the hanger, as above described, has important advantages over one employing 'a central screw or rivet connecting the opposite sides or plates with a' surrounding spacing-sleeve between the sides or plates, for the 1reason that `the screw E has a much longer bearing in the pivot-stud than can be-aiforded in the side plate, which must necessarily be very thin., and the screw can be driven into the stud with 4great force without the same danger of stripping the threads; The stud is positively held against turning,v and therefore cannot cause the screw E to work loose, while a detached sleeve surrounding aY securing-screw is liable to workloose and loosen or cause wear on the screw which is not hardened. lfurthermore, with a loose sleeve aclose fit is required both between the sleeve and the 4bearing-hole in the type-bar and between the hole in the sleeve andthescrew, but with.

the fixed stud only the iit of the stud inthe A spacidg-sleeve with a rivet passing through it and riveted at both ends to 'the hanger sides is not desirable, because if .it is found that the type-bar does not fit so exactly as required,

which can be determined only after the rivet is headed, much labor and time would be lost' in removing the rivet to detach the type-bar- Obviously a pivot-stud constructed and secured inthe manner stated could be emdifferent construction from those shown and described, and the invention is not necessarily' -restrictedto the described construction of the hanger. For example, Figs. 6-8 illustrate a construction in which the type-bar A has two side plates secured to theopposite sides thereof by ,rivetsf and a single-piece flat` sided hanger B is employed which is pivoted between the side plates of the type-bar by the stud D. Again, it is not absolutely essential that the hanger or-typebar be made with detached side plates secured on opposite sides ofa bod part. Either the typebar or hanger cou d be otherwise provided with a bifurcated portion for the reception of the coperating part.

The hangers can be secured in radial. slots in 'a segmentor support by a clamp-plate g and screws g, as shown i'n Fig. 1, or they can be mounted in the machine in any other suitable manner.

I claim as my invention- 1. The combination of-a typebar member and ah'anger member, one of which is bifurcated to embrace the other member, a pivot connectingl said members and having a reduced said bi urcated member, and means detachpart rigidly secured to one branch of,

IOC

esame' se ably connecting said pivot. to the other branchl of said bifurcated member, substantially as set forth.

2. The combination of a type-bar member and a hanger member, one of which is bifurcated to embrace the other member, a pivot connecting said members and having a` cylindrical part between the branches of said bi furcated member' and a reduced end rigidly secured in a hole in one of said branches, and means connecting said pivot to the other branch of said bifurcated member, substantially as set forth. l

3. The combinationiof` a type-bar member, and a hanger member, one of Which is bifurcated to embracethe other, a pivot having a cylindrical body arranged between the branches of said bifurcated member and haying areduced portion rigidlysecured in a hole in one of said branches, and a screw passing through a hole in said other branch into said pivot, substantially asset for-th.

1. The combination of a type-bar member,

and a hanger member, one of which is'bifurcated to embrace the other, a pivot having a cylindrical body arranged betweenl the branches of said ,bifurcated member and having a reduced portion permanently secured in a hole in one of said branches, and a screw passing through a hole in said other branch into a threaded hole in said pivot, substantially as set forth.

5. The combination of a type-bar body and a hanger-body, one of which is slightly thicker than the other, two separate side plates rigidlysecured to the thicker body, and a pivot connectingsaid side plates to the other body and having a cylindrical portien rigidly secured to one side plate and detachably secured to the other side plate,

substantially as set forth.

46. The combination of a type-bar body and a hanger-body, one of which is slightly thicker than the other, two separate side plates rigidly secured to the thicker body, a pivot connecting said side plates to the other body and having a cylindrical portion between said side plates. equal in length to the thickness of said thicker body and a re` duced end permanently secured in a hole in one side plate, and a screw connecting saidv pivot tosaid other side plate,- substantially vtheir hangers, comprising a cylindrical studhaving a reduced securing extension at oneend and a screw-threaded hole in its other end, and a headed screw with its threaded shank seated in said hole, substantially as set forth. vfitness my hand thisd day of November, .1906. y

OSCAR' C. KAVLE.

Witnesses:

CHESTER W. REID, OT'ro A. SCHILLY. 

